Any chance of going in May or September to get more days for possibly less money? I realize some people have few options for when vacation is.
I agree with
@FinnFogg about Ketchikan being a least favorite port. However, if it is what you do, littles might enjoy the Great Alaskan Lumberjack Show. It’s not so long to lose their attention and is full of action and corny behavior. There is also the Southeast Alaska Discovery Center in Ketchikan. It is an easily walkable town. And one of the rainiest in the entire US.
You wouldn’t have to spend a lot of money on excursions. And maybe this would be a good option for people with little kids.
A lot of popular (and more expensive) excursions are great for older kids and adults: glacier or whale viewing. Helicopters and floatplanes. Salmon or crab fests. Fishing boats. Hikes, small watercraft. Dog sled (summer) excursions (without the snow).
Yes, unspecified glacier for planning; this allows them to attempt a viewing based on daily conditions. It is typically an all-day activity. If not interested in looking at a fjord, you can treat it as a Sea Day. It is travel to/from the glacier that is most of the day.